Sandpapering-machine.



0. P. HAUG. SANDPAPBRING MACHINE APPLICATION FILED JULY 5, 1912.

Patented May 6, 1913.

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.U m J6 ma 6 W6 d C. F. HAUG. SANDPAPERING MACHINE. APPLICATION FILED JULY 5, 1912 Patented May 6, 1913.

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WITNESSES:

L 0 KL M m were STATES CHARLES E. HAUG, on ST. PAUL, mrnnnso'm.

sANnPAPERINe-MAcHmE.

Specification of Letters Patent.

Patented May 6,1913.

Application filed July 5, 1912. Serial No. 707,935;

To all wl zomit may concern:

subject of the King of Norway, residing at' St. Paul, in the county of Ramsey and State of Minnesota, have invented'a new and useful Sandpap'eringMachine, of which the following is a specification. I

My invention relates to sandpapering machines, and the object is to provide an. efficient device which carries its own power appliance and may be moved by hand upon window casings and sills of railway coaches and other structures for sandpapering the surface thereof. u 4

In the accompanying drawings,Figure 1 is a. top or plan View of my sandpapering machine with aportion of its electric motor broken away. Fig. 2 is a side elevation of the machine with a portion of one of its handles broken away. In said view the machine is shown as rest-ing upon a piece of lumber to be sandpapered ,Fig. 3 is a transverse .section on-the-line, aa Fig. 1 with the handles and runners of the machine omitted. Fig. 4 is a bottom view of one of i the slides 37 and the eccentric and shaft therein.

Referring to the drawing by reference numerals, I provide a skeleton frame composed of longitudinal side pieces 1, 1, secured together by transverse bars 2, 3, 4.

Said frame is provided with side handles- 44 and four lugs 5, in which slide vertically four posts 6, whose lower ends are secured in two runners 7; each post has a head 8 aboy e the lug and a partly compressed coil spring 6* encircling it below the lug, whereby the runners are yieldingly held downward.

- In slots 9 in the frame are slidingly supported the tenons orribs 10 of a block 11,

which is reciprocated by a pitma-n 12 hav-' ing one end pivoted at 13 to the block and its other end connected with a crank shaft 14, which is journaled across the frame,

which is driven by an idler gear 16; the latter is driven by a pinion 17, fixed at one end of the shaft 18 of an electric motor 20, which is secured at 21 upon the frame and connected with electric circuit wires 22 (see Fig. 2) of a suspended cable 23, which permit moving of the device to any desired part v of the work operated on.

has at one end fixed a gear wheel 15,

I Theidler gear 16, which is mounted on a stud 24 fixed in a stand 25 in the frame, also drives a gear 26 on the shaft 27 of'a roller 28. Said roller has a longitudinal side groove 29, inwhich a slightly tapered key 30 is inserted and serves to .hold the inserted edges 31 of a sheet of sandpaper 32, which is stretched about the roller. lower and slightly lengthened portion of the block 11 is also covered with sandpaper 33, which paper, as best shown in Fig. 3, has its lateral edges 34 firmly held in recesses 35 of the block by broad hooks 36 of two sliding plates 37, which are fitted to slide one upon the other in a transverse slot 38 in the block.

- Said overlapping plates are eachprovided I with a slotted hole 39 (see Fig. 4), in which is fitted an eccentric 40. Said eccentrics are fitted on a small vertical shaft 41, which is journaled in the block and has its upper end provided with a springy horizontal arm 42, engaging a segmental toothed rack 43 upon the block. It,is obvious thatby swinging the arm 42 into different notches the eccentrics will draw the hooks 36-tightly against sandpaper of diflerent thickness.

It'is evident that where compressed air power is obtainable a compressed air motor The may take the place of the electric motor the wood, he then moves the machine along upon the-surface while the roller with its coarse sandpaper does the rough part of the work and the reciprocating block comes after and finishes the work by finer sandpaper. be done very slanting or overhead surfaces.

What I claim is d A sand paperingmachine comprising a movable framehaving handles adapted to be held by the hands of the operator, a rotating roller mounted in the frame and having means for holding sandpaper detachably secured about it, and a motor mounted on the frame and operatively connected with the roller, a crank shaft journaled in until the sandpaper covering the rol er 2-8 and block 11 touch the surface of In'this manner sandpapering may fast and on level, upright,

the frame and rotatably connected with the said runners normally lower than the sandmotor, a block siidably mounted in the papering surfaces of the machine.

frame, and having means for detachably In testimony whereof I a flix my signature, holding sandpaper to it, and a pitman conin presence of two Witnesses. ne'cting said block with the crank of the CHARLES F. HAUG. crank shaft, runners carried by-the frame \Vitnesses:

.and movableto and from the sandpapering A. M. CAR SEN, side of the'machine, and springs holding A. E. CARLSEN. 

